223012217 has 4 divisors (see below), whose sum is σ = 223413156. Its totient is φ = 222611280.

The previous prime is 223012213. The next prime is 223012219. The reversal of 223012217 is 712210322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124188736 + 98823481 = 11144^2 + 9941^2 .

It is a cyclic number.

It is not a de Polignac number, because 223012217 - 2² = 223012213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223012213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199634 + ... + 200747.

It is an arithmetic number, because the mean of its divisors is an integer number (55853289).

Almost surely, 2^223012217 is an apocalyptic number.

It is an amenable number.

223012217 is a deficient number, since it is larger than the sum of its proper divisors (400939).

223012217 is an equidigital number, since it uses as much as digits as its factorization.

223012217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400938.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 223012217 is about 14933.5935728812. The cubic root of 223012217 is about 606.4237733052.

Adding to 223012217 its reverse (712210322), we get a palindrome (935222539).

The spelling of 223012217 in words is "two hundred twenty-three million, twelve thousand, two hundred seventeen".